Throw-out device



3 Sheets-Sheet 1 W. H. SMITH- THRQW-OUT DEVICE Original Filed Apf'il 14, 1921 March 31. 1925'.

March 31, 1925. v

- w. SMITH THROW-OUT DEVICE V Originl Filed A r11 14. 1921 3 She ets-Sheet 2 March 31. 1 925.

w. H. SMITH THROW-OUT DEVICE Original Filed April 14. 1921 s Sheets-Sheet z Lamas-NE rated F lter, 31, 1925.

UMTE!) STATES P TENToFFicE.

HALTER I'I. SlvIITI-I, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOIR: TO MILLER SAW- TRIMIVIER COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

THROW-OUT DEVICE.

Application filed April 14, 1921, Serial No. 461,306. Renewed August 4, 1924.

To all 107mm it may concern:

Be it known that I, .VALTER H. SMITH, a subject of the King of Great Britain, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in ThrowOut Devices, of which the following a specification.

My invention pertains to throw-out devices for printing presses, that is to say to mechanisms for automatically causing the elements of the printing couple to be thrown out of operativ relation when a sheet is not fed to the impression element of such couple.

It is an object of my invention to pnride on automatic throw-out device which will be an advance over such devices as heretofore proposed in providing an improved certainty of action. Another object of my invention lies in the production of a throw-out device which will be of an especially simple construction and easy to maintain by mechanically unskilled operators. It is another object of my invention to provide a throw-out device of such a aturc that it may be applied to existing as of pr ss without material modification of the latter, and without interference with the usual hand or foot operated devi for throwing off the impression. And other and further objects of my invention will appear from the following description taken in connection with the claims annexed thereto. p

By way of example, I have described in the following specification, and shown in the accompanying drawings, an embodiment of my invention as applied to a well known type of cylinder press and as associated with a press feeding device such as is disclosed in my co-pending application Se. No. 460,243, filed April 11, 1921. I wish specially understood, however, that my invention can be embodied in other forms, and employed inother relations, and that changes may be 'made in the particular fornrherein described and shown, without exceeding the scope thereof, as defined in the appended claims.

In the drawings:

Fig. 1 is a side elevation of a portion of a cylinder press, having an automatic throw-out device constructed in accordance with my invention, applied thereto;

Fig. 2 is a section, on an enlarged scale, taken on the line 22 of Fig. 1, looking in the direction of the arrows; I

Fig. 3 is a sectional side view showing the sheet-feeler in the position it assumes when a sheet is not present on the feedboard of the on the line 33 of Fig. 2, looking in the direction of the arrows;

Fig. 4 is a View similar to Fig. 3, but showing the sheet-feeler, in full lines, in the position it occupies when a sheet is present on the feed-board, and, in dotted lines in the position to which it'is subsequently raised; .c

Fig. 5 is a perspective view showing some of the interacting parts by which the sheetfeeler controls the actuation of the throw out device;

Fig. 6 is a perspective view of the actuating toggle, and associated parts, in their neutral position; and Q Fig. 7 is a partial side elevation showing the: positions which these parts, after being actuated, will occupy when a sheet is not fedto the feed-board.

press, the section being taken Referring now to the drawings, 10' designates the side frameof a cylinder press, the

impression cylinder being indicatedat, 11.

In such a press, it'is common to provide a foot lever 12, having a treadle 13, by the operation of which the bed and impression cylinderare thrown out of cooperative relation whenever the operator desiresto throw off the impression. By the mechanism hereinafter to be described, thisfoot lever 12 is actuated automatically whenever a sheet is not fed into position to be received by the cylinder 11.

The press is illustrated as equipped with a feed device of the kind disclosed in my co-pending application above referred to,-

such feed device including a framework 14 carrying a transverse shaft 15, driven from the press. The feed device also includes a feed-board 16 which terminates in a feedplate 17, and has secured thereto a pair of tracks 18. On the forward ends of the tracks 18 are mounted bearing brackets 19 which carry a transverse rod 20 extending across the feed-plate l7 somewhat to. the

forward by the action or" the cam the press frame 10. The link 25 is connected, through the intermediary of a slidahie" rod 27 with a stop bar 28. A coinp-ression spring" 29' is provided on the slidable rod 27, so that, in normal circumstances, a forward 'noveme it of the link will etieet a like forward movement or the stop hair 28, but when the stop bar 28 is prevented from moving forward, the spring 29' will hecompressed. allowing the'link to move towards the then stationary stop hair. The stop bar 28 is guided, from above,

a lug 2-3 0 ex 'en'ding 'trom' a bracket 31 secured to the press frame 10, it is guided troin hel ow 11v a grooved roller 32 carried hy a verticallj movable spring-pressed pin mounted in the front end of the bracket 3'1. The stop liar 28 is formed, at its end, with a ("regressed portion terminating. in a shoulder 35. Upon this depressed portion 34 normally rests a roller 36 carried by a stem 37 which eXt-nds downward from an arm 38 mounted on a shaft which rockahly supportedv in the bracket 19, a: spring 39 bet irovided' for returning I e shaft'to cri V after being; rocked. i On its" lower s e, the stop 28 isforined with a shoulder 40', which'noranally clears a lung il formed on the bracket 3i, but which will enojagze the lug 41 when the stop bar depressed. I

fivclv to'the linlcZ and; the stop 28 are toggle links 432 and 43, their other ends to a rod 44 which passes through the foot lever 12, and hasa collar to thereon, sothat a depression of the red it: will c'amse a like depression of the foot leverl'il, and thus effect a throwing of the impression. 4

Normally, when the link 25 is moved 2d on the lever 29), the stop bar 28 will likewise move forward, beingmaintained, by the spring pressed 1011732, in a plane in which its sho ul der 40 passes above the lug 41. During such. forward moveinem oi the stop bar 28, the stem 87 is raised, owing: to the cam action of the shoulder 85 on the roller 36, the shaft 39 rocking in its hearing, which it can doin the normal condition of there being a sheet in position for being received by the impression i'neinberf When a sheet is not in a position to be received by'the 1m- 28 to be forced downwar 41, after which the stop bar can Pivoted 'respeo pression n'ieinher, a device to be deseribet below prevents the shaft 39 from rocking, and thus the stem 3'! from rising;- Under these conditions, the shoulder 35, engaging against the roller 36, causes the stop bar l, the roller 32 being likewise forced downward against the action of the spring on its pin c. in this lowered position of the stop its b L LO shoulder 40 will engage against the lug move no thus he forward further forward l he stop bar ing held stationary, the further movement of the link will cause the ro 27 to slide, the spring 2i) being. compressed, and will cause the toggle inks 42, a3 to approach each other 7), whereby the rod is forced downward and the foot lever 12 actuated, the impression being-thus thrown oil. 7

The device for locking the shaft 39 against movement when a sheet is not in position to be received bythe lLHPEQSSlOH member, includes a member 46 (Figs, 24 secured uponthe rod 20 and having" extending rearwardly therefrom an arm 47 which provides a bearing for the rock shaft Upon the rock shaft 39 is secured a hooklever having, at its end, a transversely extending hook projection 4-9, which extends over shoulder 50 formed on the member 46, and beneath an abutment 5i, vhich e; tends forwardly from such member. The member 46 is formed with a downward extension 52 to which is pivoted a ieeler arm 58 having, at its "upper end, hook adapted, in one position of the parts, to enter between the hook projection 455) of the lever and the shoulder .30 01 the member 16. The leeienarm 53 has extending therefrom a feeler finger 55 disposed with its end above a slot 56 form l in the teed-plate 1'7, so that the iteeler linf ilf will enter said slot when no sheet is present on the teed-plate; V-F l'ien the :teelen finger thus enters the slot 56, the upper end of the feeler-arm 53 rests against an ad justing screw 57 carried by the member 46, the hook 5i being then between the hook projection 49' or the hook lever 18 and the shoulder 50 of the member 426' (Figs. 3 and lvhen sheet is present on the feedas mcncatcd at 58- in 1 15;. 4c, the

lot!

and thus rock the shaft '39, at a time when a sheet ought to be in place on the feedplate 17, ready to be received by the impression cylinder. If a sheet is thus in place, the teeler-arm 53 will be in the position shown in Fig. 4, and there will be no impediment to the shaft 39 being rocked. Such rocking movement of the shaft 39 will shift the feeler-arm 53 and feeler-finger into the position shown in dotted lines in 4, thus removing any resistance to movement of the sheet, such, for instance, as might be desired 'for registering. If, however, a sheet should'not be present on the feet-plate 1", the feeler-finger will drop into the slot 56 and the feeler-arm will fall forward into the position shown in Figs. 3 and 5, with its hook 54c beneath the hook projection 49 of the hook lever 48. .lnder these conditions, the engagement of the hook projection 49 against the hook 554 prevents any rocking movement of the shaft 39, the effect being that the stop bar 28 is forced into the lower plane of movement wherein its shoulder 4O engages the lug 41, and the throw-out foot lever 12 is actuated, as above explained.

An advantage of the device lies in its eX- ireme simplicity and in its certainty of oper ation. Another advantage is that the mechanism does not in any way interfere with the ordinary actuation of the lever 12 by the foot treadle 13. It is to be noted, further, that no removal of fiarts is needed to enable tie iront part of the feed-board 16 to be swung upward to give access to the press cyl inner, the roll 36 then leaving the stop bar Ti'ith the front part of the feed board thus swung upward, the automatic throvv-.

out novice will be ineffective, the lever 12, however, being operable by the foot as usual.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is:

i. In a sheetcontrolled throw-out device, an element movable as a whole and having a portion adapted to move in another direc .5011 when movement of said element is prevented, a throw-out actuating member connected with said portion, an abutment normally out of the path of said element, means for moving said element, and sheet-controlled mcans either permitting normal iovement of said element or causing it to move in a path wherein it will engage said abutment.

2. In a sheet-controlled throw-out device, a pair of toggle links normally movable together, a throw-out actuating member .0011- net-ted with said links so as to be moved when one of said links moves relatively to the other, means for moving one of said links, and sheet-controlled means permitting or preventing movement of the other link.

3. In a sheet-controlled throw-out device,

a pair of toggle links normally movable together, a throw-out actuating member con nected with said linksso as to be moved when said links move relatively to each other, means for moving one of said links, an abut-- ment normally out of the path of the other link, and sheet-controlled means either permitting'normal movement of said other link or causing said other link to move in a path wherein it will engage said abutment.

5. In a sheet-controlled throw-out device, an element including a pair of connected members and resilient means normally main-' taining said members in fixed relation with each other so as to move together, a throwout actuating m mber connected with said element so as to be moved when the members of the latter move relatively to each other, moving means connected to one side of said. element, an abutment at the other side of said element and normally out of the path thereof, and sheet-controlled means either permitting normal movement of said element or causing it to move in a path. wherein it will engage said abutment.

(i. In a sheet-controlled throw-out devi e. a pair of rods, 2:. pair of links connecting the ends of said rods, resilient means normally holding said roos in fixed relation with each other, means for reciprocating one of said rods. an abutment, meansv for normally guiding the other red in a path in which it will clear said abutment, sheet-controlled means for maintaining said guiding means or shifting said guiding means into a position in which said other rod will engage said abutment, and a throw-out actuating member connected with said links. Y

7. In a throw-out device for printing presses, an abutment, a movable slide, a resilient support normally guiding said slide in a path to clear said abutment, a throw-out actuating member governed in its operation by the engagement or non-engagement of said slide with said abutment, and sheetcontrolled means either permitting normal movement of'said slide or moving said support so as to cause said slide to move in a path in which it will engage said abutment.

8. In a throw-out device for printing presses, an abutment, a movable slide, a resilient support normally guiding said slide in a path in which it will clear said abut- .ment, 2. throw-out actuating member associated with said slide and operated when said slide engages said abutment, and sheetcontrolled means for moving said support, to cause said slide to move in a path in which it will engage said abutment, when a sheet is not fed to the press.

9. In a throwout device, an abutment, a movable slide having a cam projection thereon, resilient means for guiding said slide in a path in which it will clear said abutment, a member disposed in the path of said cam projection and adapted, when held stationary, to force said slide downward so to engage said abutment, a throwout actuating member governed in its operation by the engagement or non-engagement of said slide with said abutment, and sheet-controlled means either permitting movement of said first-named member or holding it stationary.

10. In a throw-out device for printing ZlG-SSQS, an abutment, a movable slide having a cam projection thereon, resilient means for guiding said slide in a path in which it will clear said abntm at, a normally movable member disposed in the path of said cam projection and adapted, when held stationary, to move said slide into a path in which it will engage said abutment, a throw-out actuating member associated with said slide and operated when said slide engages said abutment, and sheet-controlled means for preventing movement of said first-named member when a sheet is not fed to the press; 1

11. In throw-out device, a movable slide having a cam projection thereon, means" maintaining said slide in .a normal path of movement, a fixed jaw, a movable jaw, a

member disposed in the path of said canr projection for operating said movable jaw and for varying the path movement of said slide when said movable jaw cannot be operated, a sheet-feeler having a portion adapted to enter between said jaws in the absence of a sheet, thereby to prevent operation of said movable jaw, and a throwout actuating member associated with said slide and operated when the path of movement of the latter is varied.

12. In a throw-out device, an abutment, a

movable slide having a cam projection thereon, means normally guiding saidslide in a path to clear said abutment, a fixed jaw, a movable jaw, a member disposed in the path of said cam projection for operating said movable jaw and for varying the path of said slide, to cause the latter to ensaid abutment, when said movable jaw cannot be operated, a sheet feeler having a portion adapted to enter between said jaws in the absence of a sheet, thereby to prevent operation of said movable aw, and a throwont actuating; member operated when said slide or gages said abutment.

13. in a throw-out device, a movable slide having a cam projection thereon, means maintaining said slide in a normal Jath of movei'nent, a movable element, a member disposed in th path of said ca-m pi jection for operating said movable element and for varying the path of movement of said slide when said movable element cannot be operated, a sheet-fceler having a portion adapted to enter the path of said elementin the absence of a sheet, thereby to prevent operation of said element, and a throw-out actuating member associated with said slide and opcratedwhen the path of movement or" the latter is varied. I

let, In a throw-out device, an abutment, a movable slide' having a cam projection thereon, means normally guiding said slide in a path to clear said abutment, a movable element, a member disposed in the path of said cam proje :tion for operating said element and for varying the path of said slide, to cause the latter to engage said abutment,

when said element cannot be operated, a

sheet 'feel r having a portion adapted to venter the path 01 said element in the absence of a sheet, thereby to prevent operation oi said element, and a throw-out actuating member operated when said slide engages said abutment.

' WALTER n. SMITH.

lVitnesses V v Marin Enron,

Tnno. R. Fosrnn. 

